JPH1156902A - Sanitary product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary product softening the touch of both side edge sections to be kept in contact with the insides of thighs and capable of avoiding uncomfortableness when it is worn. SOLUTION: A body fluid absorber 4 is arranged between a water-permeable top sheet 2 and a water-nonpermeable back sheet 3 to form this sanitary product. The back sheet 3 folded with both side edges along the longitudinal direction inward and the peripheral edge of the top sheet 2 are brought into contact with each other on the outer periphery of the body fluid absorber 4, and both sheets 2, 3 are heated and fused on the side edges except for at least the outer peripheral sections of the contact sections with thighs and on the end edges along the short direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary product that can achieve softness against the skin on both sides corresponding to the inner thighs and can eliminate discomfort that may be caused by wearing.

[0002]

2. Description of the Related Art As a conventional sanitary product, as shown in FIGS. 11 and 12, a body fluid absorber (c) is provided between a water-permeable top sheet (a) and a water-impermeable back sheet (b). After heat-welding the peripheral edges of both sheets (a) and (b) against the outer periphery of the body fluid absorber (c), the outer periphery is cut to form a predetermined product. This is known (in FIG. 11, the hatched portion indicates a heat-sealed portion).

[0003] However, such a top sheet
When (a) and the back sheet (b) are heated and fused, the peripheral edges of both sheets (a) and (b) are hardened by the fusion. Therefore, even when the outer periphery is cut and shaped after the heat fusion, there is a possibility that the side edge portion hardened at the time of wearing the product hits the inner thigh and causes discomfort.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sanitary article which can soften the skin contact on both side edges corresponding to the inner thigh and avoid discomfort when worn.

[0005]

In order to solve the above-mentioned problems, the present invention adopts a method in which the peripheral edges of a back sheet and a top sheet whose both sides along the longitudinal direction are turned inward are paired on the outer periphery of the body fluid absorber. The two sheets are heated and fused at the side edges along the longitudinal direction and at least at the side edges excluding the outer peripheral end of the contact portion with the inner crotch at the side edges along the short direction.

Further, according to the present invention, the periphery of the back sheet and the top sheet whose both side edges along the longitudinal direction are turned inward are brought into contact with the outer periphery of the body fluid absorber, and both sheets are heated at the edge along the lateral direction. Can be fused.

Further, according to the present invention, before the body fluid absorber and the top sheet are polymerized, the side edge of the back sheet is folded inward and the folded edge is sandwiched between the back sheet and the body fluid absorber, or the body fluid absorber is polymerized. After the top sheet is superimposed, the side edge of the back sheet is folded inward and the folded edge is sandwiched between the body fluid absorber and the top sheet, or the side edge of the back sheet is inwardly folded after the body fluid absorber and the top sheet are polymerized. And the folded edge can be superimposed on the side edge surface of the top sheet, so that the string-shaped elastic body can be sandwiched inside the bag-shaped side edge of the back sheet formed by folding. . The bodily fluid absorber comprises a laminate of an aggregate of crushed pulp and an absorber holding a polymer absorbent.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show a first preferred embodiment of a sanitary product according to the present invention.
In (1), a sanitary article according to the present invention is shown, in which a bodily fluid absorber (4) is arranged between a water-permeable top sheet (2) and a water-impermeable back sheet (3). It is formed in a rectangle. The top sheet (2) is formed of a material such as a nonwoven fabric which gives a comfortable feeling of adhesion to the wearer's skin, and can permeate the bodily fluid discharged to the surface and move it to the internal bodily fluid absorber (4). . The back sheet (3) is made of a resin sheet such as a polyethylene sheet capable of preventing leakage of the bodily fluid absorbed by the bodily fluid absorber (4), and has an adhesive on its outer surface for attaching the sanitary article (1) to underwear. Agent is applied.

According to the present invention, when constructing such a sanitary article (1), both side edges along the longitudinal direction of the back sheet (3) are folded inward to form a bag-like side edge (5). The backsheet (3) and the topsheet (2) are brought into contact with each other at the outer periphery of the body fluid absorber (4), and at least the outer periphery of the contact portion with the inner thigh as shown by the hatched portion in FIG. The body fluid absorber (4) is held between the two sheets (2) and (3) by heat-sealing the two sheets (2) and (3) at the side edges excluding the edges and the edges along the short direction. Let me.

Therefore, even if the fused portion is hardened by the heat fusion of the sheets (2) and (3), the heat fusion is not performed at a part of the outer peripheral edge of the side edge corresponding to the inner crotch of the wearer. Softness per skin is ensured. For this,
At the time of wearing, the non-fused portion hits the inner thigh, and discomfort that is concerned at the time of wearing is avoided.

In the above-described embodiment, only the inside of the contact portion with the inner crotch except for the outer peripheral end is fused with a narrow width to prevent peeling of the two sheets (2) and (3). Body fluid absorber by fusing the side edge sandwiching the contact part with the inner thigh
If (4) can be reliably positioned and held,
The entire region corresponding to the inner thigh can be made non-fused.

In the first embodiment, both sheets (2)
Although (3) is heat-sealed on the entire circumference of the body fluid absorber (4), heat-sealing on the side edges can be omitted. That is, FIG. 6 shows a second preferred embodiment of the sanitary product according to the present invention. In this embodiment, both edges along the longitudinal direction are not heat-fused, and only at the edges along the transverse direction. Both sheets (2) and (3) are heated and fused.
Therefore, in this embodiment, since the side edges of both sheets (2) and (3) are not heated and fused at all, the unfused side edges always hit the inner crotch when worn. For this reason, even if the wearing position shifts, the hardened fused portion does not hit the inner thigh, and there is no possibility of causing discomfort.

When the fusion of the side edges is omitted as in this embodiment, there is a concern that the body fluid absorber (4) may be misaligned or the body fluid absorbed by the body fluid absorber leaks. Side edge of the back sheet (3) to be folded inward
Because of (5), there is no possibility that the function of preventing the displacement of the body fluid absorber (4) and the function of preventing the body fluid absorbed by the body fluid absorber (4) from leaking are reduced.

In the first and second embodiments,
In each case, the width of the top sheet (2) is smaller than the width of the back sheet (4). However, as in the third embodiment shown in FIG. 7, both sheets (2) and (3) have the same width. Good.

Further, in the first to third embodiments, the backsheet (3) is folded back on both side edges and then the body fluid absorber (4) and the topsheet (2) are polymerized to form the backsheet (3). By inserting the folded edge of 3) between the back sheet (3) and the body fluid absorber (4), the back sheet
The weight of the body fluid absorber (4) superimposed on (3) presses the folded edge of the back sheet to prevent the folded edge from returning, thereby preventing a decrease in production efficiency due to folding. The time point of the turning back is not limited to the above embodiment.

That is, after the body fluid absorber (4) is polymerized as in the fourth embodiment shown in FIG. 8, both side edges of the back sheet (3) are turned inward, and then the top sheet (2) is polymerized. The back edge of the back sheet (3) to the body fluid absorber (4)
The so-called horizontal leakage prevention effect is enhanced by being sandwiched between the topsheet (2) and the body fluid absorber (4) and the topsheet as in the fifth embodiment shown in FIG.
After polymerizing (2), the side edge of the back sheet (3) may be folded inward and the folded edge may be polymerized on the side edge surface of the top sheet (2) to further enhance the horizontal leakage prevention effect.

FIG. 10 shows a sixth embodiment of the sanitary product according to the present invention. In the sixth embodiment, a back sheet formed by folding back
Since the string-shaped elastic body (6) is sandwiched inside the bag-like side edge (5) of (3), a three-dimensional gather can be formed by utilizing the contraction action of the elastic body (6). Like that. Therefore, in the case according to the sixth embodiment, since a three-dimensional gather is formed by the contraction of the elastic body (6) on the side edge of the back sheet (3) when worn, a more effective horizontal leakage prevention effect is obtained. . FIGS. 11 to 13 show a preferred modification of the absorbent body of the present invention. The absorbent body (4), which is mainly composed of an aggregate of crushed pulp, has a high molecular weight absorbent on both sides of the crushed pulp. An absorber (7) sandwiching paper is arranged. The absorber (7) is
The crushed pulp is disposed in the center of the absorber (4) with a slightly smaller area.

In each of the embodiments, the case where the present invention is applied to a sanitary product is described. However, the present invention can also be applied to a vaginal discharge sheet or an incontinence pad.

[0019]

According to the first and second aspects of the present invention, both side edges of the back sheet are folded inward to form bag-like side edges, and then the contact portion with the inner crotch is formed. Is excluded and the top sheet and the back sheet are heat-sealed, so that both sides of the inner crotch can be kept soft against the skin, and discomfort during wearing can be avoided.

According to the third aspect of the present invention, the back edge of the back sheet can be prevented from returning by utilizing the pressing action of the body fluid absorber, thereby preventing a decrease in production efficiency due to the folding. can do.

Further, according to the invention described in claims (4) and (5), the side edge of the body fluid absorber can be located at the bag-like side edge formed by folding the back sheet. According to the invention as set forth in claim (6), since a three-dimensional gather can be formed at the bag-like side edge of the back sheet, a higher horizontal weft can be achieved. A leak prevention effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first preferred embodiment of a sanitary product according to the present invention.

FIG. 2 is a cross-sectional view showing a state before heat fusion of the first embodiment shown in FIG. 1;

FIG. 3 is a perspective view of the first embodiment shown in FIG. 1 before heat fusion.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 5 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 6 is a plan view showing a second preferred embodiment of the sanitary product according to the present invention;

FIG. 7 is a plan view showing a third preferred embodiment of a sanitary product according to the present invention.

FIG. 8 is a plan view showing a fourth preferred embodiment of a sanitary product according to the present invention.

FIG. 9 is a plan view showing a fifth preferred embodiment of a sanitary product according to the present invention.

FIG. 10 is a plan view showing a sixth preferred embodiment of a sanitary product according to the present invention.

FIG. 11 is a plan view showing a preferred modification of the absorbent for sanitary products according to the present invention.

FIG. 12 is a sectional view showing a state before heat fusion of the embodiment shown in FIG. 11;

FIG. 13 is a perspective view of the embodiment shown in FIG. 11 before heat fusion.

FIG. 14 is a plan view illustrating a conventional example of a sanitary product.

15 is a sectional view of the conventional example shown in FIG. 11 before heat fusion.

[Explanation of symbols]

 (1) Sanitary goods (2) Top sheet (3) Back sheet (4) Body fluid absorber (5) Bag-like side edge (6) Elastic body (7) Absorber holding polymer absorbent

Claims (7)

[Claims] 1. A sanitary product having a body fluid absorber disposed between a water-permeable top sheet and a water-impermeable back sheet, comprising: a back sheet having both side edges along a longitudinal direction folded inward; Attaching the peripheral edge of the top sheet at the outer periphery of the bodily fluid absorber, and heat-fusing both sheets at the side edge and the edge along the short direction excluding at least the outer peripheral edge of the contact portion with the inner thigh. Sanitary products. 2. A sanitary product having a body fluid absorber disposed between a water-permeable top sheet and a water-impermeable back sheet, comprising: a back sheet having both side edges along a longitudinal direction folded inward; A sanitary product characterized in that a peripheral edge of a top sheet is brought into contact with an outer periphery of a bodily fluid absorber, and both sheets are heated and fused at an edge along a lateral direction. 3. The backsheet according to claim 1, wherein the side edges of the backsheet are folded inward before the body fluid absorber and the topsheet are polymerized, and the folded edges are sandwiched between the backsheet and the body fluid absorber. Menstrual goods as described. 4. The method according to claim 1, wherein the side edges of the back sheet are folded inward after the body fluid absorber is polymerized and before the top sheet is polymerized, and the folded edges are sandwiched between the body fluid absorber and the top sheet. 3. The sanitary article according to 1 or 2. 5. The back sheet according to claim 1, wherein the side edge of the back sheet is folded inward after the body fluid absorber and the top sheet are polymerized, and the folded edge is polymerized on the side edge surface of the top sheet. Sanitary items. 6. The sanitary product according to claim 1, wherein a string-shaped elastic body is held inside the bag-like side edge of the back sheet formed by folding. 7. The sanitary product according to claim 1, wherein the body fluid absorber comprises a laminate of an aggregate of crushed pulp and an absorber holding a polymer absorbent.